Ramit Sethi is a New York Times best-selling author and creator of one of our favorite personal finance sites, I Will Teach You to Be Rich. In his weekly video Q&A, Ramit answers common questions about personal finance, careers, and more. This week: What's the best approach for paying down debt while also investing…

Getting and keeping a good credit score is important in renting an apartment, buying a home, and most other finance-based ventures. CNN Money offers their best tips on how to maintain a FICO score, including the 20-percent rule.